Prepared roofing and process of making same



June 24 1924- C. E; RAHR PREPARED ROOFING AND PROCESS OF MAKING SAME Filed oct. 5, 1921 Chefer Fai/l', @MMM ig@ f.

l50 stance used in dune 24, 1924.

Cms'rnn E.

F BOSTGN, MASSACHUSETTS, ASSIGNOR TO THE FLINTKOTE COM- y PATENT ori-'ica PANY, OF IBUSTON, MASSACHUSETTS, A. CORPORATION 0F MASSACHUSETTS.

PREPARED ROOFING AND PROCESS OF MAKING SAJIE.,

Application filed October 5, 1921. Serial No. 505,502.

To all whom z't may concern.'

Be it known that I, CHESTER E. RAHR,

a citizen of the United States, residing in the city of Boston, county of Suffolk, and State of Massahusettamave invented certain new and useful Improvements in P repared .Roofing and Processes of Making Same, of which the following is a specifip cation.

This invention is more particularly. directed to that type of waterproof covering in which symmetricaldesigns are formed by means of comminuted material. In the resent invention the designs -are forme by having spaced selected areas of one face of the product covered by comminuted granular or gritt material, such as ravel, green stone, crus ed rock, crushed rick or the like, while the main areas are covered by granular comminuted material of a contrasting color to the first comminuted material, the second comminuted material being of an asphaltic or bituminous character.

Among the salient objects of the invention are to provide a waterproofing sheet, the

body ortion of which consists essentially of 'aspha t or bituminous saturated felt, one face of which is covered with an adhesive coating and upon which coating is applied 3o two diderent comminuted materials 1n the form of symmetrical designs; to produce a roduct in which the ornamental designs are ormed by the combined use of comminuted bituminous Aasphaltic or pitchy hard bodies of a non-bituminous, granular material; to

provide a product in which the bituminous, pitchy or asphaltic bodies may be` formed of such substances as lsonite, elaterite, Wurtzilite, Cuban aspha t and in some cases even 40 Cuban, yTrinidad or Bermudez asphalt or coal tar or other hard pitches.

Tn the drawingsl Fig. l is a face view of the sheet. Fig. 24s an edge view, and

Fig. 3 is a fragmentary view of the sheet before surfacing. I

Referring in detail to the drawing, the roog felt 1,' such as is common to the prepared 'roofing art or any fabricated .sub-

s oonnectlon such as paper' or tar or numerous other. substances having a bituminous base,- is imposed in the fornr of a coating upon the saturated sheet and is maintained in an adhesive form while a comminuted substance 3 such as asphalt, gilsonite, elaterite, wurtzilite, or comminuted oil shale, dr comminuted refined Trinidad or Bermu ez is placed upon they sheet in the form of a design. This design may be made 'to simulate common shingles or .hexagonal forms of preparedy shingles or mnumerable figures placed upon Ithe coated sheet to produce an ornamental eifect. This comminuted substance placed in the form of a design adheres to the coated sheet and produces non-adhesive surface on those portions of the `sheet which are covered. After the imposition of this design, there 1s placed upon the sheet a granular surfacing material 4 such as gravel, crushed adhere to the sheet u on the portions which are not covered by t` e non-adhesive design making substance.

The two materials so placed upon the adhesive sheet produce an attractive ornamented roofing sheet which, when pressure rolled, forms an attractive surfacing which is inexpensive to manufacture and at the same time, has the advantages of the more expensive roof coverings now upon. the market. The design shown in the drawings is but one example of innumerable effects that may be produced with the placing of the substances upon the adhesive coated sheet. Similar roofing sheets have been produced where graphite has been used to form the design and av granular substance applied to lill the spaces between the designs. Also roofing .material hasbeen produced in which the portion of the sheet has been kept totally devoid of material and the design produced by surfacing only that) portion of the sheet which lies between the de-' sign markings. The present product is a departure from this in theta comminuted bituminous or adhesive design markings which are placed upon the sheet in the form of the higher melting point substance.

I claim as my invention:

1. Prepared roofing comprising a sheet saturated With a waterproof composition and coated With an adhesive substance, a comminuted non-adhesive bituminous substance imposed upon the adhesive coating in the form of a design and a colored granular surfacing, covering the adhesive coating not occupied bythe non-adhesive design forming substance.

2. Prepared roofing comprising a sheet of felted vfibrous material saturated `With a Waterproof substance and. coated `with an adhesive bituminous composition;- a comminuted non-adhesive high melting point bituminous substance, placed upon the adhesive coating in the form of adesign and a colored granular substance VSurfacing the adhesive coating on that portion of the sheet not occupied by the non-adhesive substance.

3. A process for producing prepared roofing, consisting in coating a sheet of prepared 'roofing With an adhesive substance, imposing a design of non-adhesive co-mminuted asphaltic substance upon the adhesive coating and surfacing the-remaining adhesive coating With a colored granular surfacing.

4. A process of producing prepared roofing, consisting in coatinV the prepared roofing sheet with an adhesive bituminous composition, producing-a design thereon by the imposition of a comminuted high melting point asphalti/c composition andsurfacing the remaining portion of the sheet with a colored granular mineral surfacing.

5. A process of producing prepared roofing consisting in coating a sheet with a Waterproofing adhesive substance, applying a design-of non-adhesive high melting point.

asphaltio material upon the adhesive coating to produce non-adhesive areas of a predetermined configuration, applying a granular surfacing to the sheet which adheres to the adhesive portion, impressing the granular surfacing into the coating substance whereby a design is produced by the nonadhesive areas.

CHESTER E. RAHR. 

